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Specialized - Cathode Ray ·CathodeRay

MW2218

Philips/Mullard direct-view monochrome television picture tube with magnetic deflection and family-specific focusing and heater arrangements. Manufacturer documentation identifies receiver display service across the MW22 and MW31 picture-tube families.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12C
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

Direct-view television picture tube with magnetic deflection.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12C
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
11000 V

CRT-specific optical, focusing, deflection, accelerating-voltage, scan, capacitance, and safety data are retained in TUBE_SECTION_PARAMETER because the locked promoted fields primarily target conventional electrode sections.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    300 mA

  • DeflectionMethod

    Magnetic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

Data set 02

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

  • DeflectionMethod

    Magnetic

  • FocusingMethod

    Magnetic

Other

  • TypicalAcceleratingVoltage

    7000 V

  • MaximumAcceleratingVoltage

    11000 V

Data set 03

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    6.3 V

    CathodeRay

  • Heater current

    300 mA

    CathodeRay

  • Electrical reference

    MW22-16

    SameFamilyCharacteristics

  • Heater supply

    Series or parallel

    TelevisionCRT

Construction

  • Focusing

    Magnetic

    CathodeRay

  • Deflection

    Magnetic

    CathodeRay

  • Screen color

    White

    CathodeRay

  • Variant construction

    without ion trap

    TelevisionCRT

  • Screen color

    White

    TelevisionCRT

Data set 04

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Grid No.1 cutoff voltage

    -20 to -50 V

Construction

  • Useful screen diameter

    200 mm

  • Deflection method

    Magnetic

  • Focusing method

    Magnetic

  • Screen construction

    Metal-backed

Other

  • Operating anode voltage

    7000 V

  • Maximum anode voltage

    9000 V

  • Grid No.2 / auxiliary anode voltage

    200 V

  • Electrical data reference

    MW2217

    SourceCrossReference